Morris WFIN35160 Instructions Manual

Category
Split-system air conditioners
Type
Instructions Manual

This manual is also suitable for

LOFT SERIES
• WFIN-26160 / WFOD-26161
• WFIN-35160 / WFOD-35161
• WFIN-50160 / WFOD-50161
• WFIN-70160 - WFOD-70161
CONTENTS
SAFETY PRECAUTIONS
NAME OF PARTS
REMOTE CONTROL
OPERATION INSTRUCTIONS
INSTALLATION PRECAUTIONS
INDOOR UNIT INSTALLATION
OUTDOOR UNIT INSTALLATION
TEST OPERATION
MAINTENANCE
TROUBLESHOOTING
INSTRUCTION FOR SERVICING(R32)
...........................................................................................................................30
......................................................................................................27
........................................................................................................22
...............................................................................................................................4
............................................................................................................... .....1
..................................................................................................... ...19
................................................................................................................................31
................................................................................................14
......................................................................................................................33
............................................................................................................13
...........................................................................................................................6
* The design and specifications are subject to change without prior notice for product improvement.
Consult with the sales agency or manufacturer for details.
* The shape and position of buttons and indicators may vary according to the model, but their function
are the same.
1
1. Read this guide before installing and using the appliance.
2. During the installation of the indoor and outdoor units the access to the working area should be
forbidden to children. Unforeseeable accidents could happen.
3. Make sure that the base of the outdoor unit is firmly fixed.
4. Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving
the air conditioner.
5. Carry out a test cycle after installing the air conditioner and record the operating data.
6. Protect the indoor unit with a fuse of suitable capacity for the maximum input current or with
another overload protection device.
7. Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch
or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding
the risk of electric shock or fire due to insufficient contact.
8. Check that the socket is suitable for the plug , otherwise have the socket changed.
9. The appliance must be fitted with means for disconnection from the supply mains having a
contact separation in all poles that provide full disconnection under over voltage category III
conditions, and these means must be incorporated in the fixed wiring in accordance with the
wiring rules.
10. The air conditioner must be installed by professional or qualified persons.
11. Do not install the appliance at a distance of less than 50 cm from inflammable substances
(alcohol, etc.) Or from pressurized containers (e.g. spray cans).
12. If the appliance is used in areas without the possibility of ventilation, precautions must be taken
to prevent any leaks of refrigerant gas from remaining in the environment and creating a danger
of fire.
13. The packaging materials are recyclable and should be disposed of in the separate waste bins.
Take the air conditioner at the end of its useful life to a special waste collection center for disposal.
14. Only use the air conditioner as instructed in this booklet. These instructions are not intended to
cover every possible condition and situation. As with any electrical household appliance, common
sense and caution are therefore always recommended for installation, operation and maintenance.
15. The appliance must be installed in accordance with applicable national regulations.
16. Before accessing the terminals, all the power circuits must be disconnected from the power supply.
17. The appliance shall be installed in accordance with national wiring regulations.
18. This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance
shall not be made by children without supervision.
SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER
SAFETY PRECAUTIONS
19. Do not try to install the conditioner alone, always contact specialized technical personnel.
20. Cleaning and maintenance must be carried out by specialized technical personnel. In any case
disconnect the appliance from the mains electricity supply before carrying out any cleaning or
maintenance.
21. Ensure that the mains voltage corresponds to that stamped on the rating plate. Keep the switch
or power plug clean. Insert the power plug correctly and firmly into the socket, thereby avoiding
the risk of electric shock or fire due to insufficient contact.
22. Do not pull out the plug to switch off the appliance when it is in operation, since this could create
a spark and cause a fire, etc.
23. This appliance has been made for air conditioning domestic environments and must not be used
for any other purpose, such as for drying clothes, cooling food, etc.
24. Always use the appliance with the air filter mounted. The use of the conditioner without air filter
could cause an excessive accumulation of dust or waste on the inner parts of the device with
possible subsequent failures.
25. The user is responsible for having the appliance installed by a qualified technician, who must
check that it is earth in accordance with current legislation and insert a thermos magnetic circuit
breaker.
26. The batteries in remote controller must be recycled or disposed of properly. Disposal of Scrap
Batteries --- Please discard the batteries as sorted municipal waste at the accessible collection point.
27. Never remain directly exposed to the flow of cold air for a long time. The direct and prolonged
exposition to cold air could be dangerous for your health. Particular care should be taken in the
rooms where there are children, old or sick people.
28. If the appliance gives off smoke or there is a smell of burning, immediately cut off the power
supply and contact the Service Center.
29. The prolonged use of the device in such conditions could cause fire or electrocution.
30. Have repairs carried out only by an authorised Service Centra of the manufacturer. Incorrect
repair could expose the user to the risk of electric shock, etc.
31. Unhook the automatic switch if you foresee not to use the device for a long time. The airflow
direction must be properly adjusted.
32. The flaps must be directed downwards in the heating mode and upwards in the cooling mode.
33. Ensure that the appliance is disconnected from the power supply when it will remain inoperative
for a long period and before carrying out any cleaning or maintenance.
34. Selecting the most suitable temperature can prevent damage to the appliance.
2
SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLER
SAFETY PRECAUTIONS
1. Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire
are probably due to a damaged power cord. Specialized technical personnel only must replace a
damaged power cord.
2. Do not use extensions or gang modules.
3. Do not touch the appliance when barefoot or parts of the body are wet or damp.
4. Do not obstruct the air inlet or outlet of the indoor or the outdoor unit. The obstruction of these
openings causes a reduction in the operative efficiency of the conditioner with possible consequent
failures or damages.
5. In no way alter the characteristics of the appliance.
6. Do not install the appliance in environments where the air could contain gas, oil or sulphur or near
sources of heat.
7. This appliance is not intended for use by persons (including children ) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person responsible for their safety.
8. Do not climb onto or place any heavy or hot objects on top of the appliance.
9. Do not leave windows or doors open for long when the air conditioner is operating.
10. Do not direct the airflow onto plants or animals.
11. A long direct exposition to the flow of cold air of the conditioner could have negative effects on
plants and animals.
12. Do not put the conditioner in contact with water. The electrical insulation could be damaged and
thus causing electrocution.
13. Do not climb onto or place any objects on the outdoor unit.
14. Never insert a stick or similar object into the appliance. It could cause injury.
15. Children should be supervised to ensure that they do not play with the appliance. If the supply
cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
3
SAFETY RULES AND PROHIBITIONS
SAFETY PRECAUTIONS
Air filter
Emergency button
Front panel
Air inlet
Indoor Unit
Outdoor Unit
Note: This figure shown may be different from the actual object. Please take the latter as the
standard.
Mounting plate
Air inlet
Drainage pipe
Wiring cover
Connection wiring
Valve protective cover
With the protective cover removed
Liquid valve
(High pressure valve)
Gas valve
(Low pressure valve)
4
Refrigerant
connecting pipe
Air deflector and flap
Air outlet
Air outlet
NAME OF PARTS
Indoor Display
The shape and position of switches and indicators may be different according to the model,
but their function is the same.
1
2
3
Indicator for Timer, temperature and Error codes.
Lights up during Timer operation.
SLEEP mode
5
1
2
3
NAME OF PARTS
REMOTE CONTROL
Remote control DISPLAY
6
The display and some functions of the remote control may vary according to the model.
Symbols
Cooling Mode
Dry Mode
Fan only Mode
Heating Mode
Fan speed:
Auto/ low/ low-mid/ mid/ mid-high/ high
TURBO function
Mute function
Up-down auto swing
Temperature indicator
Meaning
Left-right auto swing
SLEEP function
Timer
Battery indicator
Auto Mode
Health function
I FEEL function
ECO Mode
8 heating function
o
C
Signal indicator
Gentle wind
Child-Lock
Display ON/OFF
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Self-Clean function
GEN function
REMOTE CONTROL
7
The shape and position of buttons and indicators may vary according to the model, but their
function is the same.
The display and some functions of the remote control may vary according to the model.
The unit confirms the correct reception of each button with the beep.
REMOTE CONTROL
8
Replacement of Batteries
Remove the battery cover plate from the rear of the remote control, by pressing
and sliding it in direction as the arrow.
Install the batteries by putting ( -) at the side with spring on the remote controller.
Reinstall the battery cover by sliding it into place.
Use 2 pieces LRO3 AAA (1.5V) batteries.
Do not use rechargeable batteries.
Replace the old batteries with new ones of the same
type when the display is no longer legible.
Do not dispose batteries as unsorted municipal waste.
Collection of such waste separately for special
treatment is necessary.
Note:
1. Direct the remote control toward the Air conditioner.
2. Check that there are no objects between the remote control and the Signal receptor in the
indoor unit.
3. Never leave the remote control exposed to the rays of the sun.
4. Keep the remote control at a distance of at least 1m from the television or other electrical
appliances.
Each time when insert the batteries in the remote controller for the first time,
you can set the Cooling only or Heating pump control type. As soon as you insert the batteries,
turn off the remote controller, and operate as below.
1. Long press the MODE button, until the ( ) icon flash, to set the Cooling only type.
2. Long press the MODE button, until the ( ) icon flash, to set the Heating pump type.
Note: If you set the remote control in cooling mode, it will not be possible to activate the
heating function in units with a heating pump. If you need to reset, take out the
batteries and install again.
You can program the temperature display between
oo
C and F.
1. Press and hold the TURBO button over 5 seconds to get into the change mode;
oo
2. Press and hold the TURBO button, until it switch to C and F;
3. Then release the pressing and wait for 5 seconds, the function will be selected.
9
REMOTE CONTROL
COOLING MODE
HEATING MODE
The cooling function allows the air
conditioner to cool the room and
reduce Air humidity at the same
time.
HEAT
The heating function allows the air
conditioner to heat the room.
To activate the cooling function (COOL), press the
MODE button until the symbol appears on
the display.
With the button or set a temperature lower
than that of the room.
To activate the heating function (HEAT), press the
MODE button until the symbol appears on the
display.
With the button or set a temperature higher
than that of the room.
In HEATING operation, the appliance can
automatically activate a defrost cycle, which
is essential to clean the frost on the condenser
so as to recover its heat exchange function.
This procedure usually lasts for 2-10 minutes.
During defrosting, indoor unit fan stop
operation. After defrosting, it resumes to
HEATING mode automatically.
COOL
(For North American market)
If necessary, you can press ECO button 10
times within 8 seconds under heating mode
to start the forced defrosting. It will defrost
the outdoor ice much more fast.
DRY MODE
This function reduces the humidity
of the air to make the room more
comfortable.
DRY
To set the DRY mode, Press MODE until
appears in the display. An automatic function of
pre-setting is activated.
FAN MODE (Not FAN button)
FAN
Fan mode, air ventilation only.
To set the FAN mode, press MODE until
appears on the display.
AUTO MODE
Automatic mode.
AUTO
To set the AUTO mode, press MODE until
appears on the display.
In AUTO mode the run mode will be set
automatically according to the room temperature.
FAN SPEED function (FAN button)
FAN
Change the operating fan speed.
Press FAN button to set the running fan speed,
it can be set to AUTO/ MUTE/ LOW/ LOW-MID
/ MID/ MID-HIGH/ HIGH/ TURBO speed circularly.
Child-Lock function
1. Long press MODE and TIMER button together
to active this function, and do it again to
deactivate this function.
2. Under this function, no single button will active.
(Flash)
10
REMOTE CONTROL
To automatic switch on the
appliance.
TIMER function ---- TIMER OFF
To automatic switch off the
appliance.
When the unit is switch-off, you can set the
TIMER ON.
To set the time of automatic switch-on as below:
When the unit is switch-on, you can set the
TIMER OFF.
To set the time of automatic switch-off, as below:
1. Confirm the appliance is ON.
2. Press the TIMER button at first time to set the
switch-off.
Press or to set the needed timer.
3. Press TIMER button at the second time to
confirm.
CANCEL it by press TIMER button.
Note: All programming should be operated within
5 seconds, otherwise the setting will be
cancelled.
TIMER
TIMER
Never position Flaps manually, the delicate
mechanism might seriously damaged!
Never put fingers, sticks or other objects into
the air inlet or outlet vents. Such accidental
contact with live parts might cause
unforeseeable damage or injury.
1. Press the button SWING to activate the louver,
1.1 Press
to activate the horizontal flaps
to swing from up to down, the will appear
on the remote display.
1.2 Press to active the vertical deflectors
to swing from left to right, the will appear
on the remote display.
1.3 Do it again to stop the swing movement at
the current angle.
2. If the vertical deflectors are positioned manually
which placed under the flaps, they allow to move
the air flow direct to rightward or leftward.
TURBO function
TURBO
To activate turbo function, press the TURBO
button, and will appear on the display.
Press again to cancel this function.
In COOL/ HEAT mode, when you select TURBO
feature, the appliance will turn to quick COOL or
quick HEAT mode, and operate the highest fan
speed to blow strong airflow.
TIMER function ---- TIMER ON SWING function
1. Press TIMER button first time to set
the switch-on, and will appear on the
remote display and flashes.
2. Press or to button to set desired Timer-on
time. Each time you press the button, the time
increases/decreases by half an hour between 0
and 10 hours and by one between 10 and 24
hours.
3. Press TIMER button second time to confirm.
4. After Timer-on setting, set the needed mode
(Cool/ Heat/ Auto/ Fan/ Dry), by press the
MODE button. And set the needed fan speed,
by press FAN button. And press or to set
the needed operation temperature.
CANCEL it by press TIMER button.
3.
Long press or over 3 seconds to select
more angles of the airflow direction.
11
REMOTE CONTROL
MUTE function ECO function
MUTE
1. Press MUTE button to active this function,
and will appears on the remote display.
Do it again to deactivate this function.
2. When the MUTE function runs, the remote
controller will display the auto fan speed, and
the indoor unit will operate at lowest fan
speed to be quiet feeling.
3. When press FAN/ TURBO button, the MUTE
function will be cancel. MUTE function
can not be activated under dry mode.
I FEEL function (Optional)
Press I FEEL button to active the function, the
will appear on the remote display.
Do it again to deactivate this function.
This function enables the remote control to
measure the temperature at its current location,
and send this signal to the air conditioner to
optimize the temperature around you and ensure
the comfort.
It will automatically deactivate 2 hours later.
I FEEL
DISPLAY function (Indoor display)
DISPLAY
Switch ON/OFF the LED display on
panel.
Press DISPLAY button to switch off the LED
display on the panel. Press again to switch on the
LED display.
ECO
In this mode the appliance
automatically sets the operation to
save energy.
Press the ECO button, the appears on the
display, and the appliance will run in ECO mode.
Press again to cancel it.
Note: The ECO function is available in both
COOLING and HEATING modes.
SLEEP function
SLEEP
Pre-setting automatic operating
program.
After 10 hours running in sleep mode, the air
conditioner will change to the previous setting
mode.
Press SLEEP button to activate the SLEEP
function, and appears on the display.
Press again to cancel this function.
GEN function (Optional)
1. Turn on the indoor unit at first, and long press
MUTE button 3 seconds to active, and do it
again to deactivate this function.
2. Under this function, short press MUTE button
to select the General type L3 - L2 - L1 - OF.
3. Select OF and wait 2 seconds to exit it.
12
REMOTE CONTROL
SELF-CLEAN function (Optional)
Gentle Wind function (Optional)
Only optional for some heating pump inverter
appliance.
To active this function, turn off the indoor unit
at first, then press CLEAN button
then you will hear a beep, AC will
appear on the indoor LED, and will
appear on the remote display .
1. This function helps carry away the accumulated
dirt, bacteria, etc from the indoor evaporator.
2. This function will run about 30 minutes, and it
will return to the pre-setting mode. You can
press button to cancel this function during
the process.
You will hear 2 beeps when it's finished or
cancelled.
It's normal if there is some noise during this
function process, as plastic materials expand
with heat and contract with cold.
1.
Turn on the indoor unit, and change to COOL
mode, then press GENTLE COOL button to
activate the function, will appear on the
display.
Do it again to deactivate it.
2. This function will auto close the vertical flaps,
and give you the comfortable gentle wind feeling.
Health function (Optional)
1. Turn on the indoor unit at first, press HEALTH
to active this function, will appear on the
display.
Do it again to deactivate it.
2. When the HEALTH function is initiated, the
Ionizer/ Plasma/ Bipolar Ionizer/ UVC Lights
(depending on models) will be energized and
running.
8 heating function (Optional)
o
C
1. Long press ECO button over 3 seconds to active
this function, and ( ) will appear on
the remote display.
Do it again to deactivate this function.
oo
8C 46F
2. This function will auto start the heating mode
o
when the room temperature is lower than 8 C
o
(46 F), and it will return to standby if the
oo
temperature reaches 9 C (48 F).
o
3. If the room temperature is higher than 18 C
o
(64 F), the appliance will cancel this function
automatically.
Indoor unit
Outdoor unit
oo
Temp < 86 F (30 C)
oo o o
41 F (5 C) < Temp < 86 F (30 C)
We suggest operating this function at the
following ambient conditions to avoid certain
safety protection features.
It's suggested to utilize this function every
3 months.
13
Attempt to use the air conditioner under the temperature beyond the specified range may cause
the air conditioner protection device to start and the air conditioner may fail to operate. Therefore,
try to use the air conditioner in the following temperature conditions.
It beeps briefly once.
It keeps beeping for a while
With the power supply connected, restart the air conditioner after shutdown, or switch it to other
mode during operation, and the air conditioner protection device will start. The compressor will
resume operation after 3 minutes.
Characteristics of heating operation (applicable to Heating pump)
It beeps briefly twice.
Fixed air conditioner:
Preheating:
When the heating function is enabled, the indoor unit will take 2~5 minutes for preheating, after
that the air conditioner will start heating and blows warm air.
Defrosting:
During heating, when the outdoor unit frosted, the air conditioner will enable the automatic
defrosting function to improve the heating effect. During defrosting, the indoor and outdoor fans
stop running. The air conditioner will resume heating automatically after defrosting finish.
Emergency button:
Open the panel and find the emergency button on the electronic control box when the remote
controller fails . (Always press the emergency button with insulation material.)
Current status
Enter mode
Respond
Operation
Standby
Running
Standby
(Only for heating pump)
Press the emergency button
twice in 3 seconds
Cooling mode
Off mode
Heating mode
Press the emergency button
once
Press the emergency button
once
OPERATION INSTRUCTIONS
(open the panel of indoor unit)
control-box cover
Inverter air conditioner:
Dry
Heating
Cooling
027~
Room temperature
-7 24~
T1 climate: 15 43~
17 32~
T3 climate: 15 52~
Outdoor temperature
Temperature
MODE
0 ~30
-20 ~30
Dry
Heating
Cooling
Room temperature
17 32~
Outdoor temperature
Temperature
MODE
T3 climate: 15 55~
(Low temperature
heating: -25 ~30
)
T1 climate: 15 ~53
(Low temperature cooling: -15 ~
53 )
INSTRUCTION FOR SERVICING(R32)
1. Check the information in this manual to find out the dimensions of space needed for proper
installation of the device, including the minimum distances allowed compared to adjacent
structures.
2
2. Appliance shall be installed, operated and stored in a room with a floor area larger than 4m .
3. The installation of pipe-work shall be kept to a minimum.
4. The pipe-work shall be protected from physical damage, and shall not be installed in an
2
unventilated space if the space is smaller than 4m .
5. The compliance with national gas regulations shall be observed.
6. The mechanical connections shall be accessible for maintenance purposes.
7. Follow the instructions given in this manual for handling, installing, cleaning, maintaining and
disposing of the refrigerant.
8. Make sure ventilation openings clear of obstruction.
9. Notice: The servicing shall be performed only as recommended by the manufacturer.
10. Warning: The appliance shall be stored in a well-ventilated area where the room size corresponds
to the room area as specified for operation.
11. Warning: The appliance shall be stored in a room without continuously operating open flames
(for example an operating gas appliance) and ignition sources (for example an operating
electric heater).
12. The appliance shall be stored so as to prevent mechanical damage from occurring.
13. It is appropriate that anyone who is called upon to work on a refrigerant circuit should hold a
valid and up-to-date certificate from an assessment authority accredited by the industry and
recognizing their competence to handle refrigerants, in accordance with the assessment
specification recognized in the industrial sector concerned. Service operations should only be
carried out in accordance with the recommendations of the equipment manufacturer.
Maintenance and repair operations that require the assistance of other qualified persons must
be conducted under the supervision of the person competent for the use of flammable
refrigerants.
14. Every working procedure that affects safety means shall only be carried out by competent persons.
15. Warning:
* Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
* The appliance shall be stored in a room without continuously operating ignition sources
(for example: open flames, an operating gas appliance or an operating electric heater.
* Do not pierce or burn.
* Be aware that refrigerants may not contain an odor.
Operating instructions
Read technical manual
Caution: Risk of fire
14
16. Information on servicing:
1) Checks to the area
Prior to beginning work on systems containing flammable refrigerants, safety checks are
necessary to ensure that the risk of ignition is minimized. For repair to the refrigerating system,
the following precautions shall be complied with prior to conducting work on the system.
2) Work procedure
Work shall be undertaken under a controlled procedure so as to minimize the risk of a
flammable gas or vapor being present while the work is being performed.
3) General work area
All maintenance staff and others working in the local area shall be instructed on the nature of
work being carried out. Work in confined spaces shall be avoided. The area around the
workspace shall be sectioned off. Ensure that the conditions within the area have been made
safe by control of flammable material
4) Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to
ensure the technician is aware of potentially flammable atmospheres. Ensure that the leak
detection equipment being used is suitable for use with flammable refrigerants, i.e.
non-sparking, adequately sealed or intrinsically safe.
5) Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts,
appropriate fire extinguishing equipment shall be available to hand. Have a dry powder or CO
2
fire extinguisher adjacent to the charging area.
6) No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any
pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or
explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently
far away from the site of installation, repairing, removing and disposal, during which refrigerant
can possibly be released to the surrounding space. Prior to work taking place, the area around
the equipment is to be surveyed to make sure that there are no flammable hazards or ignition
risks. No Smoking signs shall be displayed.
7) Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the
system or conducting any hot work. A degree of ventilation shall continue during the period
that the work is carried out.
The ventilation should safely disperse any released refrigerant and preferably expel it externally
into the atmosphere.
8) Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the
correct specification. At all times the manufacturer's maintenance and service guidelines shall
be followed.
If in doubt consult the manufacturer's technical department for assistance.
INSTRUCTION FOR SERVICING(R32)
15
The following checks shall be applied to installations using flammable refrigerants:
-- The charge size is in accordance with the room size within which the refrigerant containing
parts are installed;
-- The ventilation machinery and outlets are operating adequately and are not obstructed;
-- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the
presence of refrigerant;
-- Marking to the equipment continues to be visible and legible. Markings and signs that are
illegible shall be corrected;
-- Refrigeration pipe or components are installed in a position where they are unlikely to be
exposed to any substance which may corrode refrigerant containing components, unless the
components are constructed of materials which are inherently resistant to being corroded or
are suitably protected against being so corroded.
9) Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and
component inspection procedures. If a fault exists that could compromise safety, then no
electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault
cannot be corrected immediately but it is necessary to continue operation, an adequate
temporary solution shall be used. This shall be reported to the owner of the equipment so all
parties are advised.
Initial safety checks shall include:
-- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of
sparking;
-- That there no live electrical components and wiring are exposed while charging, recovering
or purging the system;
-- That there is continuity of earth bonding.
17. Repairs to sealed components
1) During repairs to sealed components, all electrical supplies shall be disconnected from the
equipment being worked upon prior to any removal of sealed covers, etc. If it is absolutely
necessary to have an electrical supply to equipment during servicing, then a permanently
operating form of leak detection shall be located at the most critical point to warn of a
potentially hazardous situation.
2) Particular attention shall be paid to the following to ensure that by working on electrical
components, the casing is not altered in such a way that the level of protection is affected. This
shall include damage to cables, excessive number of connections, terminals not made to original
specification, damage to seals, incorrect fitting of glands, etc. Ensure that apparatus is mounted
securely. Ensure that seals or sealing materials have not degraded such that they no longer serve
the purpose of preventing the ingress of flammable atmospheres. Replacement parts shall be in
accordance with the manufacturer's specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection
equipment. Intrinsically safe components do not have to be isolated prior to working on them.
18. Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that
this will not exceed the permissible voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence
of a flammable atmosphere. The test apparatus shall be at the correct rating. Replace components
only with parts specified by the manufacturer. Other parts may result in the ignition of refrigerant
in the atmosphere from a leak.
INSTRUCTION FOR SERVICING(R32)
16
19. Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp
edges or any other adverse environmental effects. The check shall also take into account the
effects of aging or continual vibration from sources such as compressors or fans.
20. Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the searching for or
detection of refrigerant leaks. A halide torch (or any other detector using a naked flame) shall
not be used.
21. Leak detection methods
The following leak detection methods are deemed acceptable for systems containing flammable
refrigerants.
Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may
not be adequate, or may need re-calibration. (Detection equipment shall be calibrated in a
refrigerant-free area.) Ensure that the detector is not a potential source of ignition and is suitable
for the refrigerant used. Leak detection equipment shall be set at a percentage of the LFL of the
refrigerant and shall be calibrated to the refrigerant employed and the appropriate percentage of
gas (25 % maximum) is confirmed. Leak detection fluids are suitable for use with most refrigerants
but the use of detergents containing chlorine shall be avoided as the chlorine may react with the
refrigerant and corrode the copper pipe-work. If a leak is suspected, all naked flames shall be
removed/ extinguished. If a leakage of refrigerant is found which requires brazing, all of the
refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part
of the system remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through the
system both before and during the brazing process.
22. Removal and evacuation
When breaking into the refrigerant circuit to make repairs or for any other purpose conventional
procedures shall be used. However, it is important that best practice is followed since
inflammability is a consideration. The following procedure shall be adhered to:
-- Remove refrigerant;
-- Purge the circuit with inert gas;
-- Evacuate;
-- Purge again with inert gas;
-- Open the circuit by cutting or brazing.
The refrigerant charge shall be recovered into the correct recovery cylinders. The system shall be
flushed with OFN to render the unit safe. This process may need to be repeated several times.
Compressed air or oxygen shall not be used for this task.
Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill
until the working pressure is achieved, then venting to atmosphere, and finally pulling down to a
vacuum. This process shall be repeated until no refrigerant is within the system. When the final
OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to
take place. This operation is absolutely vital if brazing operations on the pipe-work are to take
place.
Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is
ventilation available.
23. Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with
the equipment and all its detail. It is recommended good practice that all refrigerants are
recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken
in case analysis is required prior to re-use of reclaimed refrigerant. It is essential that electrical
power is available before the task is commenced.
INSTRUCTION FOR SERVICING(R32)
17
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure, ensure that:
. mechanical handling equipment is available, if required, for handling refrigerant cylinders;
. all personal protective equipment is available and being used correctly;
. the recovery process is supervised at all times by a competent person;
. recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various
parts of the system.
F) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer's instructions.
h
)
D
o not overfill cylinders. (No more than 80 % volume liquid charge).
i)
Do not exceed the maximum working pressure of the cylinder, even temporarily.
J)
When the cylinders have been filled correctly and the process completed, make sure that the
cylinders and the equipment are removed from site promptly and all isolation valves on the
equipment are closed off.
K) Recovered refrigerant shall not be charged into another refrigeration system unless it has been
cleaned and checked.
24
. Labeling
Equipment shall be labeled stating that it has been de-commissioned and emptied of refrigerant.
T
he label shall be dated and signed. Ensure that there are labels on the equipment stating the
equipment contains flammable refrigerant.
25
. Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is
recommended good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery
cylinders are employed. Ensure that the correct number of cylinders for holding the total system
charge are available. All cylinders to be used are designated for the recovered refrigerant and
labeled for that refrigerant (i.e. Special cylinders for the recovery of refrigerant). Cylinders shall
be complete with pressure-relief valve and associated shut-off valves in good working order.
E
mpty recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the
equipment that is at hand and shall be suitable for the recovery of all appropriate refrigerants
including, when applicable, flammable refrigerants. In addition, a set of calibrated weighing scales
shall be available and in good working order. Hoses shall be complete with leak-free disconnect
couplings and in good condition. Before using the recovery machine, check that it is in satisfactory
working order, has been properly maintained and that any associated electrical components are
sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recover
cylinder, and the relevant waste transfer note arranged. Do not mix refrigerants in recovery units
and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an
acceptable level to make certain that flammable refrigerant does not remain within the lubricant.
T
he evacuation process shall be carried out prior to returning the compressor to the suppliers.
O
nly electric heating to the compressor body shall be employed to accelerate this process. When
oil is drained from a system, it shall be carried out safely.
INSTRUCTION FOR SERVICING(R32)
18
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Morris WFIN35160 Instructions Manual

Category
Split-system air conditioners
Type
Instructions Manual
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